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# Json

- `Json()`

Validates if the given input is a valid JSON.

```php
v::json()->assert('{"foo":"bar"}');
// Validation passes successfully
```

## Templates

### `Json::TEMPLATE_STANDARD`

|       Mode | Template                              |
| ---------: | :------------------------------------ |
|  `default` | {{subject}} must be a JSON string     |
| `inverted` | {{subject}} must not be a JSON string |

## Template placeholders

| Placeholder | Description                                                      |
| ----------- | ---------------------------------------------------------------- |
| `subject`   | The validated input or the custom validator name (if specified). |

## Categorization

- Strings

## Changelog

| Version | Description       |
| ------: | :---------------- |
|   3.0.0 | Templates changed |
|   0.3.9 | Created           |

## See Also

- [Domain](Domain.md)
- [Email](Email.md)
- [Phone](Phone.md)